③ The word "must" is blunt and can be changed to "please be strict" and "please".
(4) The word "inquiry" is inappropriate, and it is changed to "soliciting the opinions of the author" here.
⑤ The sentence "Have the right to handle the manuscript independently" has no subject and its meaning is unclear. You can add "author".
⑥ Adjust the word order and put brackets after "E-mail". (just change five places)